Submission #288552

#	Time	Username	Problem	Language	Result	Execution time	Memory
288552		errorgorn	"The Lyuboyn" code (IZhO19_lyuboyn)	C++14	100 / 100	109 ms	29008 KiB

lyuboyn

//雪花飄飄北風嘯嘯
//天地一片蒼茫

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << " is " << x << endl

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

int n,k,t;
string s;

vector<string> dp(int i,int j){
	if (j==1){
		vector<string> v;
		string st;
		rep(x,0,i) st+="0";
		v.push_back(st);
		
		rep(x,0,i){
			int temp=sz(v);
			rep(y,temp,0){
				v.push_back(v[y]);
				v.back()[x]='1';
			}
		}
		
		return v;
	}
	else{
		auto v=dp(i-2,j-2);
		vector<string> res;
		
		int t=sz(v);
		
		int idx;
		rep(x,0,i-2) if (v[0][x]==v.back()[x]) idx=x+2;
		
		rep(x,0,t){
			if (x%2==0) res.push_back("00"+v[x%t]);
			else res.push_back("11"+v[x%t]);
		}
		rep(x,0,t){
			if (x%2==0) res.push_back("01"+v[x%t]);
			else res.push_back("10"+v[x%t]);
			
			res.back()[idx]^=1;
		}
		rep(x,0,t){
			if (x%2==0) res.push_back("11"+v[x%t]);
			else res.push_back("00"+v[x%t]);
		}
		rep(x,0,t){
			if (x%2==0) res.push_back("10"+v[x%t]);
			else res.push_back("01"+v[x%t]);
			
			res.back()[idx]^=1;
		}
		
		
		return res;
	}
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	cin>>n>>k>>t;
	cin>>s;
	
	if (k%2==0){
		cout<<"-1"<<endl;
		return 0;
	}
	
	auto v=dp(n,k);
	
	int idx;
	rep(x,0,sz(v)) if (v[x]==s) idx=x;
	
	cout<<sz(v)<<endl;
	rep(x,0,sz(v)) cout<<v[(x+idx)%sz(v)]<<endl;
	
	rep(x,0,sz(v)){
		string s=v[x],t=v[(x+1)%sz(v)];
		
		int cnt=0;
		rep(x,0,n) if (s[x]!=t[x]) cnt++;
		if (cnt!=k) cout<<s<<" "<<t<<endl;
	}
}

Compilation message (stderr)

lyuboyn.cpp: In function 'std::vector<std::__cxx11::basic_string<char> > dp(int, int)':
lyuboyn.cpp:65:18: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   65 |    res.back()[idx]^=1;
      |                  ^
lyuboyn.cpp: In function 'int main()':
lyuboyn.cpp:103:27: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
  103 |  rep(x,0,sz(v)) cout<<v[(x+idx)%sz(v)]<<endl;
      |                         ~~^~~~~

• Subtask 1: 0 / 0
• Subtask 2: 5 / 5
• Subtask 3: 3 / 3
• Subtask 4: 11 / 11
• Subtask 5: 15 / 15
• Subtask 6: 18 / 18
• Subtask 7: 31 / 31
• Subtask 8: 17 / 17